In most states the parents of a minor child may agree to the amount of child support, and courts encourage the parents to do so. But the court will generally review the agreed amount of child support and determine whether it is in the best interest of the child before signing a child support order. And if the parents later agree to change the amount of or need for child support, they should return to court and get a signed order that reflects the agreed or changed amount, as only the court may change the legal obligation under a child support order.

In Washington State, parents of a minor child can come to an agreement regarding the amount of child support. This collaborative approach is encouraged as it often leads to a more amicable arrangement. However, any agreement made by the parents must be reviewed by the court to ensure that it serves the best interest of the child. The court will consider the Washington State Child Support Schedule and other relevant factors to determine if the agreed amount is appropriate. If the parents wish to modify the child support amount or the need for it at a later date, they must petition the court for a modification of the existing child support order. The court will then review the proposed changes and decide whether to approve them. It is important to note that only a court can legally alter the obligations set forth in a child support order, and informal agreements between parents without court approval do not change the legal responsibilities.